期刊
PHYSICAL REVIEW LETTERS
卷 126, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.126.017202
关键词
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资金
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [360506545, 403030645, 403191981, 403194850, 107745057]
- excellence clusterMCQST under Germany's Excellence Strategy [390814868]
- European Metrology Programme for Innovation and Research (EMPIR) programme
- European Unions Horizon 2020 research and innovation programme
- European Research Council (ERC) [788031]
- JSPS Overseas Research Fellowship
- DFG [1072/5-1, 270344603, 1072/6-1, 324327023]
- DFG SFB1143 [247310070]
In the cubic chiral magnet Cu2OSeO3, novel magnetic states including low-temperature skyrmion state and tilted conical state were observed. Dynamic resonances of these magnetic states were studied, revealing resonant modes associated with different states and the interaction between them.
In the cubic chiral magnet Cu2OSeO3 a low-temperature skyrmion state (LTS) and a concomitant tilted conical state are observed for magnetic fields parallel to h100i. Here, we report on the dynamic resonances of these novel magnetic states. After promoting the nucleation of the LTS by means of field cycling, we apply broadband microwave spectroscopy in two experimental geometries that provide either predominantly in-plane or out-of-plane excitation. By comparing the results to linear spin-wave theory, we clearly identify resonant modes associated with the tilted conical state, the gyrational and breathing modes associated with the LTS, as well as the hybridization of the breathing mode with a dark octupole gyration mode mediated by the magnetocrystalline anisotropies. Most intriguingly, our findings suggest that under decreasing fields the hexagonal skyrmion lattice becomes unstable with respect to an oblique deformation, reflected in the formation of elongated skyrmions.
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